I.v.28-44
Lady Macbeth:

The raven himself is hoarse
That croaks the fatal entrance of Duncan
Under my battlements. Come, you spirits
That tend on mortal thoughts, unsex me here,
And fill me from the crown to the toe top-full
Of direst cruelty. Make thick my blood.
Stop up the access and passage to remorse,
That no compunctious visitings of nature
Shake my fell purpose, nor keep peace between
The effect and it! Come to my woman’s breasts,
And take my milk for gall, you murd'ring ministers,
Wherever in your sightless substances
You wait on nature’s mischief. Come, thick night,
And pall thee in the dunnest smoke of hell,
That my keen knife see not the wound it makes,
Nor heaven peep through the blanket of the dark
To cry “Hold, hold!”


I.vii.1-28


MACBETH
If it were done when ’tis done, then ’twere well
It were done quickly. If the assassination
Could trammel up the consequence, and catch
With his surcease success; that but this blow
Might be the be-all and the end-all here,
But here, upon this bank and shoal of time,
We’d jump the life to come. But in these cases
We still have judgment here, that we but teach
Bloody instructions, which, being taught, return
To plague th' inventor: this even-handed justice
Commends the ingredients of our poisoned chalice
To our own lips. He’s here in double trust:
First, as I am his kinsman and his subject,
Strong both against the deed; then, as his host,
Who should against his murderer shut the door,
Not bear the knife myself. Besides, this Duncan
Hath borne his faculties so meek, hath been
So clear in his great office, that his virtues
Will plead like angels, trumpet-tongued, against
The deep damnation of his taking-off;
And pity, like a naked newborn babe,
Striding the blast, or heaven’s cherubim, horsed
Upon the sightless couriers of the air,
Shall blow the horrid deed in every eye,
That tears shall drown the wind. I have no spur
To prick the sides of my intent, but only
Vaulting ambition, which o'erleaps itself
And falls on th' other.





II.i.33-62 Macbeth

Is this a dagger which I see before me,The handle toward my hand? Come, let me clutch thee.I have thee not, and yet I see thee still.Art thou not, fatal vision, sensibleTo feeling as to sight? Or art thou butA dagger of the mind, a false creation,Proceeding from the heat-oppressèd brain?I see thee yet, in form as palpableAs this which now I draw.Thou marshall’st me the way that I was going,And such an instrument I was to use.Mine eyes are made the fools o' th' other senses,Or else worth all the rest. I see thee still,And on thy blade and dudgeon gouts of blood,Which was not so before. There’s no such thing.It is the bloody business which informsThus to mine eyes. Now o'er the one half-worldNature seems dead, and wicked dreams abuseThe curtained sleep. Witchcraft celebratesPale Hecate’s offerings, and withered murder,Alarumed by his sentinel, the wolf,Whose howl’s his watch, thus with his stealthy pace,With Tarquin’s ravishing strides, towards his designMoves like a ghost. Thou sure and firm-set earth,Hear not my steps, which way they walk, for fearThy very stones prate of my whereabout,And take the present horror from the time,Which now suits with it. Whiles I threat, he lives.Words to the heat of deeds too cold breath gives A bell rings.I go, and it is done. The bell invites me.
Hear it not, Duncan, for it is a knell
That summons thee to heaven or to hell.